Eutech Instruments 2-WIRE CONDUCTIVITY TRANSMITTER User Manual

EUTECH INSTRUMENTS

2-Wire Conductivity Transmitter

Operating Instructions

3 Diagram and Dimensions (in mm)

4 Installation

Operating with one or several Transmitters:

Figure 1 - Operating with 1 Transmitter

1 Preface

Thank you for purchasing the Eutech 2-wire Conductivity Transmitter. This manual serves to explain the correct installation and operations of

the XTR Transmitters. Other Transmitters available individually are: pH, ORP (REDOX), Conductivity, Dissolved Oxygen and Temperature.

• EC-PH-XTR;

• EC-ORP-XTR;

• EC-CON-XTR;

• EC-DO-XTR; and

• EC-TEMP-XTR.

The information presented in this manual is subject to change without prior notice, as improvements are made to the product. While Eutech will endeavor to try its best to inform the market, this does not represent a commitment on the part of Eutech Instruments Pte Ltd.

Eutech Instruments does not accept any responsibility for damage or malfunction of the unit due to improper installation or operation of the Transmitter.

Eutech Instruments Pte Ltd. Blk 55 Ayer Rajah Crescent #04-14/24, Singapore 139 949. Tel: (65) 778 6876; Fax: (65) 773 0836; e-mail:

marketing@eutechinst.com; Home page: http://www.eutechinst.com

2 Introduction

The Transmitter is used for the continuous measurement of pH, ORP (REDOX), Conductivity, Dissolved Oxygen or Temperature, in conjunction with an appropriate sensor. Data output is via 4-20 mA current output.

The Transmitter is housed in a IP65 enclosure, with openings for input and 4-20mA output.

Figure 2 - Operating with several transmitters

5 Electrical Connections

6 Before Calibration

Remove cover of Transmitter and ensure that electrode is correctly connected as above. Connect Amp meter to the 4/20mA output of Transmitter (Appendix 1).

7 Conductivity Transmitter Calibration

Prepare fresh Calibrating solutions.

1) Hold electrode in air (electrode MUST be dry) and Amp meter should read 4mA; if not, calibration is necessary;

2) Locate “Zero adjustment” trimmer; Using a fine screwdriver, slowly turn trimmer till Amp meter reads 4mA;

3) For greater accuracy, adjust the slope with Standard calibrating solutions;

4) Rinse probe in de-ionised water and immerse in standard solution;

5) In 1413 µµS solution, the output is 5.1304 mA;

6) In 2764 µµS solution, the output is 6.2112 mA;

7) In 12.88 mS solution, the output is 14.304 mA;

8) Using a fine screwdriver, slowly turn trimmer, marked ‘FSMS’, till Amp meter reads correct mA value with respective Standard solutions.

9) Remember to disconnect Amp meter and close cover.

NB: For other Standard values, expected current output is based on:

mA = {(16/20) x Conductivity value of Standard soln} + 4mA

Figure 4 - Method Two

10 Ordering Information

Item Cat Code

pH Transmitter ECPHXTR Combination pH Electrode, General, integral 5m cable ECARTSO05B Combination pH Electrode, w/PMP, integral 5m cable ECARGTSO05B

Dissolved Oxygen

Item Cat Code

Dissolved Oxygen Transmitter ECDOXTR General Purpose D.O. probe, 0.5 – 40 ppm, Industrial,

integral 5m cable General Purpose D.O. probe, 0 – 10 ppm, Industrial,

integral 5m cable

ECDOGEN

ECDOTPll

8 Specifications

Model ECCONXTR

Range 0.00 TO 20.00 mS Accuracy 2% Full Scale Calibration 2 pts Input 3-wire (2-wires for Conductivity cell; 1 wire for

Thermistor) Output 4-20 mA Operating

DC 12 V to 24 V

Voltage Load 100 Ohms max. for 12 V;

600 Ohms max. for 24V

Housing 77 x 77 x 28 mm, field mountable

9 Appendix 1

Connecting Amp Meter for Calibration

ORP

Item Cat Code

ORP Transmitter ECORPXTR Combination Platinum ORP Electrode, w/PMP,

integral 5m cable Combination Gold ORP Electrode, w/PMP, integral

5m cable

ECHTPTTSO05B

ECHTAUTTSO05B

Conductivity

Item Cat Code

Conductivity Transmitter ECCONXTR 2-Pin SS,k=1.0, integral 3m cable ECCONSEN46

Temperature

Item Cat Code

Temperature Transmitter ECTEMPXTR Pt 100 probe, SS316 ECPT10001M or

ECPT10005M

Power Supply

Item Cat Code

120V Power Supply EC-120-XTR 220V Power Supply EC-220-XTR

Figure 3 - Method One